Mass Spectra Interpretation:
CARBOXYLIC ACIDS


No. of Questions= 7

ELECTRON IMPACT MASS SPECTROMETRY PRODUCED THE SPECTRA BELOW. MANY PEAKS ARE LABELLED TO AID INTERPRETATION: M/Z (RELATIVE ABUNDANCE).

LOOK AT THE HINTS AND FOLLOW THE WEB REFERENCE LINK FOR HELP. YOU WILL NEED A PERIODIC TABLE, A TABLE OF COMMON ISOTOPES (WHICH YOU CAN FIND IN THE WEB REFERENCE), A CALCULATOR, AND SCRATCH PAPER TO WORK THIS QUIZ.


1 Find the alkyl ion series in the spectra below. (Check the hint!)
      Web Reference      
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a) 29, 43
b) 45, 73
c) none
2 Find the alkyl LOSS ion series in the spectra shown below. (Check the hint!)
      Web Reference      
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a) 29, 43
b) 45, 73
c) none
3 From this same spectrum, choose the compound that the spectrum represents.
      Web Reference      
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a) 2-propanoic acid
b) hydrazine carboxylic acid, methyl ester
c) butanoic acid
d) 2-methyl propanoic acid
e) 1-methoxy butane
4 Choose the compound that this spectrum represents.
      Web Reference      
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a) methyl formate
b) acetic acid
c) hydroxy acetonitrile
d) 2-propenoic acid
e) butanoic acid
5 Choose the compound that this spectrum represents.
      Web Reference      
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a) butanoic acid, propyl ester
b) heptanoic acid
c) benzoic acid
d) octanoic acid
e) 2-methyl propanoic acid
6 Choose the compound that this spectrum represents.
      Web Reference      
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a) cyclopentane carboxylic acid
b) 3,3-dimethyl-butanoic acid
c) 2-ethyl-butanoic acid
d) benzoic acid
e) 2,2-dimethyl-butanoic acid
7 Choose the compound that this spectrum represents.
      Web Reference      
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a) 2-methyl benzaldehyde
b) benzoic acid
c) heptanoic acid
d) 2-hydroxy benzaldehyde
e) ethyl chloroacetate





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